Thermocouple well



Feb. 23, i932. 1. ,1t BESHARA 1,847,059

v THERMOGOUPLE WELL Filed Jan. 8, 1930 etienne ree. aa ieee JOHN J. BIESHABA, OE EQBT ARTHUR, T

s, nssreuon 'ro run Texas connu,

NEW YQEK, El. Y., A CORPORATION 0F DELAWARE THERMOCOUPLE WELL Application filed January 8, 1930. Serial No. 419,299.

This invention relates to wells for holding thermometers or thermocouples in substances of various kinds undergoing treatment .or temperature change and relates more speelfically to an improved corrosion resisting well, which is also resistant to the adherence of cokey deposits, for use where substances containing various corrosive compounds and coke forming constituents are undergoing heat'treatinent, for example, hydrocarbon oils undergoing cracking.`

ln the cracking of hydrocarbon oils where corrosive compounds are present, which in the most prevalent forms are particularly destructive to relatively pure iron or steel of which the bulk of the apparatus in this sort of equipment is composed, it is necessary to protect the walls of the vessels and pipes from these compounds.

Various linings have been used with more or less success in protecting the walls of such vessels and pipes in apparatus of this nature but no positive success has been. had in the attempt to provide thermometer and thermocouple wells for the instruments used for observing or recording the temperature of substances undergoing treatment containing highly corrosive compounds.

lin addition to the comparatively short life, due to corrosion, of the average thermometer wells in the presence of corrosive compounds another objection presents itself in that oohey or carbon-like constituents in the substance tend to adhere to ordinary thermometer wells made ofiron or steel and thereby form a coating or a mass of the carbon-like material upon it which, since it is a poor conductor of heat, renders the thermometer much less sensitive to temperature changes of the substance under observation. The most effective alloy known for use in corrosive atmospheres, as considered here, is that alloy consisting of a preponderance of chromium, nickel and iron, which is also rjepulsive to the adherence of cokey partic es.

, Thus the foremost object of this invention isto provide a suitably constructed well of durable material. which will not only be resistant to corrosion but will also repulse ad herence of cokey or carbon-like constituents thereto.

This together with other objects of the invention will be better understood from the following detailed nection with the accompanying drawing which illustrates in sectional elevation a preferred form of thermometer well made in accordance with the invention.

A. relatively thin walled elongated tubular 0o member 1, having one end open aand threaded exteriorly is provided with a Harige member 3 near the exteriorly threaded end and with a suitable closure plug 2 in its opposite end which welded therein thus forming a socket or well. lt will be understood that the plug is not essential as the tube end itself may be formed so as to eiect a closure. The Harige` 3 is preferably bored to fit snugly ber l and when it is advanced a certain distance over the well from the threaded end it is preferably welded to the wall of the well to suitably secure it thereto.

A shorter tubular member or sleeve 10 havi@ ing one end flared to cooperate with a hub or boss like protrusion 3a on the Harige 3, has a loosely surrounding flange 12 which coopcrates with the dared `end of the member l0.

rlhe other end of the tubular member l0, 23@

which may be either plain or threaded exteriorly, is adapted to be inserted through the wall of a vessel or pipe 4, inclosing a treating zone whose temperature is under observation,

and may be secured thereto either by Welds or 35 threads or both, the wall 4 being preferably provided with appropriate heat insulating material 5.

ln assembling the `thermometer well the plug end of the well member l is inserted in @n y the flared end ofthe tubular member 10, after the latter is secured in the wall of the vessel or pipe 4, and advanced until the boss 3a of the iiange 3 is in contact with the ared'end of the tube l0 when it is drawn up bolts 1l and the cooperating flanges 3 and 12 to form a leak-proof joint between the boss 3a and the flare on the pi e l0.

Obviously many modi cations and variations of the invention, as hereinbefore set um description taken in conplug is preferably screwed and @fr over the well rnemto tightly by @5 l forth, the spirit and scope thereof, and therefore, only such limitations should be imposed as are indicated in the appended claims.

I claim:

1. A thermocouple well comprising a tubular member having a closed end adapted to protrude into a treating zone and. an open end adapted to protrude outsidethereof containf ing a thermocouple, a flange attached to the tubular member near its open end, a sleeve artially inclosing the tubular member having one end adapted to be secured into means inclosing the treating zone and the other end ared and protruding outwardly, a slip flange on the sleeve adapted to cooperate with its flared end and the ange on the tubular member and bolts for drawing the two flanges together thereby securing the thermocouple well rigidly in the sleeve and thereby into the treatmg zone. l 4

2. A. thermocouple well of corrosion resisting alloy metal composed chieiy of iron, chromium and nickel which resists the adherence of carbon deposits thereto comprising a tubular member having a closed end adapted to protrude into a treating zone and n. an open end adapted to protrude outside thereof for containing a thermocouple., a ange attached to the tubular member near its open end, a sleeve partially inclosing the tubular member having one end adapted to be secured into means inclosing the treating zone and the other end flared and protruding outwardly, a slip flange on the sleeve adapted to cooperate with its flared end andthe Bange on the tubular member and bolts for drawing the two anges together thereby securing the thermocouple well rigidly in the sleeve and thereby into the treating zone,

lin witness whereof I have hereunto set my hand this 23 day of December, 1929.

l JOHN J. BESHARA.

may be made without departing from 

